API: Fix shared memory only action handlers.

Some API action handlers called vl_msg_ai_send_shmem()
directly. That breaks Unix domain socket API transport.

A couple (bond / vhost) also tried to send a sw_interface_event
directly, but did not send the message to all that had
registred interest. That scheme never worked correctly.
Refactored and improved the interface event code.

Change-Id: Idb90edfd8703c6ae593b36b4eeb4d3ed7da5c808
Signed-off-by: Ole Troan <ot@cisco.com>

test/framework.py

@@ -316,6 +316,7 @@ class VppTestCase(unittest.TestCase):
                            "main-core", str(cpu_core_number), "}", "statseg",
                            "{", "socket-name", cls.stats_sock, "}", "plugins",
                            "{", "plugin", "dpdk_plugin.so", "{", "disable",
+                           "}", "plugin", "rdma_plugin.so", "{", "disable",
                            "}", "plugin", "unittest_plugin.so", "{", "enable",
                            "}"] + cls.extra_vpp_plugin_config + ["}", ]
         if cls.extra_vpp_punt_config is not None: